MRI scanner

Abstract

A magnetic resonance imaging (MRI) scanner includes a control device, a gradient coil for generating a gradient field, a gradient coil connector for connecting the gradient coil to the control device, and a temperature sensor. The temperature sensor is configured and disposed to detect a temperature of the gradient coil connector.

The invention claimed is: 
     
       1. A magnetic resonance imaging (MRI) scanner comprising:
 a control device comprising a frequency control device; 
 a B0 coil arrangement; 
 a B1 coil arrangement; 
 a gradient coil for generating a gradient field; 
 a gradient coil connector for connecting the gradient coil to the control device; 
 a tube bore; 
 a cooling device for directly cooling components of the MRI scanner, the cooling device not directly cooling the gradient coil connector or the tube bore; and 
 a temperature sensor, wherein the temperature sensor is configured and disposed to detect a temperature of the gradient coil connector or the tube bore, 
 wherein the frequency control device is connected to the B1 coil arrangement and is configured to control a B1 frequency of a magnetic field generated by the B1 coil arrangement, and 
 wherein the frequency control device is connected to the temperature sensor to receive a temperature signal from the temperature sensor. 
 
     
     
       2. The MRI scanner as claimed in  claim 1 , further comprising a casing for accommodating the B0 coil arrangement. 
     
     
       3. The MRI scanner as claimed in  claim 1 , wherein the frequency control device is configured to control the B1 frequency as a function of the temperature signal. 
     
     
       4. The MRI scanner as claimed in  claim 3 , wherein the frequency control device is configured to generate the frequency proportionally to the temperature signal. 
     
     
       5. The MRI scanner as claimed in  claim 4 , wherein the frequency control device is configured to generate the frequency proportionally to the temperature signal with a proportionality factor of 16.6 to 30. 
     
     
       6. The MRI scanner as claimed in  claim 4 , wherein the frequency control device is configured to generate the frequency additionally with a predetermined additive constant. 
     
     
       7. A method for controlling a magnetic resonance imaging (MRI) scanner having directly cooled and not directly cooled components, the method comprising:
 generating a control signal for a B1 coil arrangement; and 
 detecting a temperature of a gradient coil connector or a tube bore, 
 wherein the generating comprises generating the control signal as a function of the detected temperature, a frequency of the control signal being formed as a function of the detected temperature, 
 wherein the generating further comprises generating the control signal such that a frequency of the control signal is generated proportionally to the detected temperature, and 
 wherein the generating further comprises generating the control signal such that the frequency of the control signal is generated proportionally to the detected temperature using a proportionality factor of 16.6 to 30.